The thing is that pycharm creates all of your projects inside a virtual environment. So the packages that you installed outside the virtual environment(global site packages) does not get inherited in to your project. There is a simple solution for that. When you create a pycharm project, make sure to check the "inherit global-site packages" checkbox as shown here.Then you'll be able to import all the packages to your virtual environment, provided they have been installed in your computer.
Alternatively you can install all the packages separately using "pip install" in the pycharm terminal. If the package has been installed outside the virtual environment, pip will use cached files instead of downloading the package again.
Or you can install the packages using Settings -> Project -> Project Interpreter as the other answers suggests.
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